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#!/usr/bin/env python
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"""The IPython Controller with 0MQ
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This is a collection of one Hub and several Schedulers.
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"""
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#-----------------------------------------------------------------------------
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# Copyright (C) 2010 The IPython Development Team
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#
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# Distributed under the terms of the BSD License. The full license is in
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# the file COPYING, distributed as part of this software.
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#-----------------------------------------------------------------------------
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#-----------------------------------------------------------------------------
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# Imports
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#-----------------------------------------------------------------------------
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from __future__ import print_function
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import logging
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from multiprocessing import Process
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import zmq
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from zmq.devices import ProcessMonitoredQueue
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# internal:
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from IPython.utils.importstring import import_item
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from IPython.utils.traitlets import Int, CStr, Instance, List, Bool
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from .entry_point import signal_children
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from .hub import Hub, HubFactory
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from .scheduler import launch_scheduler
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#-----------------------------------------------------------------------------
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# Configurable
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#-----------------------------------------------------------------------------
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class ControllerFactory(HubFactory):
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"""Configurable for setting up a Hub and Schedulers."""
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usethreads = Bool(False, config=True)
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# pure-zmq downstream HWM
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hwm = Int(0, config=True)
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# internal
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children = List()
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mq_class = CStr('zmq.devices.ProcessMonitoredQueue')
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def _usethreads_changed(self, name, old, new):
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self.mq_class = 'zmq.devices.%sMonitoredQueue'%('Thread' if new else 'Process')
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def __init__(self, **kwargs):
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super(ControllerFactory, self).__init__(**kwargs)
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self.subconstructors.append(self.construct_schedulers)
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def start(self):
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super(ControllerFactory, self).start()
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child_procs = []
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for child in self.children:
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child.start()
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if isinstance(child, ProcessMonitoredQueue):
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child_procs.append(child.launcher)
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elif isinstance(child, Process):
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child_procs.append(child)
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if child_procs:
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signal_children(child_procs)
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def construct_schedulers(self):
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children = self.children
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mq = import_item(self.mq_class)
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maybe_inproc = 'inproc://monitor' if self.usethreads else self.monitor_url
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# IOPub relay (in a Process)
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q = mq(zmq.PUB, zmq.SUB, zmq.PUB, 'N/A','iopub')
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q.bind_in(self.client_info['iopub'])
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q.bind_out(self.engine_info['iopub'])
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q.setsockopt_out(zmq.SUBSCRIBE, '')
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q.connect_mon(maybe_inproc)
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q.daemon=True
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children.append(q)
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# Multiplexer Queue (in a Process)
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q = mq(zmq.XREP, zmq.XREP, zmq.PUB, 'in', 'out')
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q.bind_in(self.client_info['mux'])
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q.bind_out(self.engine_info['mux'])
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q.connect_mon(maybe_inproc)
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q.daemon=True
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children.append(q)
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# Control Queue (in a Process)
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q = mq(zmq.XREP, zmq.XREP, zmq.PUB, 'incontrol', 'outcontrol')
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q.bind_in(self.client_info['control'])
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q.bind_out(self.engine_info['control'])
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q.connect_mon(maybe_inproc)
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q.daemon=True
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children.append(q)
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# Task Queue (in a Process)
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if self.scheme == 'pure':
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self.log.warn("task::using pure XREQ Task scheduler")
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q = mq(zmq.XREP, zmq.XREQ, zmq.PUB, 'intask', 'outtask')
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q.setsockopt_out(zmq.HWM, self.hwm)
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q.bind_in(self.client_info['task'][1])
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q.bind_out(self.engine_info['task'])
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q.connect_mon(maybe_inproc)
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q.daemon=True
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children.append(q)
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elif self.scheme == 'none':
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self.log.warn("task::using no Task scheduler")
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else:
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self.log.info("task::using Python %s Task scheduler"%self.scheme)
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sargs = (self.client_info['task'][1], self.engine_info['task'], self.monitor_url, self.client_info['notification'])
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kwargs = dict(scheme=self.scheme,logname=self.log.name, loglevel=self.log.level, config=self.config)
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q = Process(target=launch_scheduler, args=sargs, kwargs=kwargs)
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q.daemon=True
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children.append(q)
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